Raspberry Pi (k3s) Monitoring: Prometheus + Grafana, the Pi-friendly way

YISUSVII

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3 days ago

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Why this guide?

Running a full monitoring stack on a Raspberry Pi is totally doable — as long as you keep it lean. This guide installs kube-prometheus-stack (Prometheus, Alertmanager, exporters) with Grafana, tuned for tiny hardware.

What you’ll get

• Prometheus scraping your k3s cluster
• Grafana dashboards (admin/admin by default)
• Light resource footprint (safe for a Pi)
• Easy uninstall/cleanup at the end

0) Prereqs

• k3s running on your Pi (kubectl get nodes works)
• Your non-root user (e.g., yisusvii) has kubeconfig at ~/.kube/config
• Helm 3 installed

curl -fsSL https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash

Tip: if helm or kubectl complains about localhost:8080, copy /etc/rancher/k3s/k3s.yaml to ~/.kube/config, chown it to your user, and replace 127.0.0.1 with your Pi’s LAN IP (e.g., 192.168.50.10).

1) Add the Helm repo and create a namespace

kubectl create namespace monitoring
helm repo add prometheus-community…